JPH07326025A - Magnetic head cleaner for optical disk device - Google Patents

Abstract

PURPOSE:To occasionally clean a magnetic head without executing control different from the control at the time of recording and reproducing. CONSTITUTION:A disk body is composed of a transparent substrate 1 formed with a signal surface 2 at the format meeting an optical disk device, a reflection film 3 which has reflectivity meeting this optical disk device and is deposited on the signal surface of the transparent substrate and a protective film 4 which covers this reflection film. A cleaning sheet 5 consisting of a non-woven fabric or polishing sheet cut to a prescribed size and shape is stuck onto the protective film of the disk body, by which a magnetic head cleaner 10 for optical disks is formed. The common use of the protective film as an adhesive for the cleaning sheet is possible as well. Housing of this magnetic head cleaner in a disk cartridge meeting the optical disk device is possible as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device in which an optical pickup is arranged on one side of a mounted optical disk and a magnetic head is arranged on the other side thereof, and the magnetic head slides on the optical disk. The present invention relates to a magnetic head cleaner suitable for an optical disk device.

[0002]

2. Description of the Related Art For example, as in a mini disk drive,
2. Description of the Related Art An optical disk device in which an optical pickup is arranged on one side of a mounted optical disk and a magnetic head is arranged on the other side of the mounted optical disk, and the magnetic head is slid on the surface of the optical disk is conventionally known. It is recommended to form a lubricating layer on the sliding surface of the magnetic head of the optical disk applied to such an optical disk device in order to prevent abrasion of both the optical disk and the magnetic head.

However, when a lubricating layer is formed on the sliding surface of the magnetic head of the optical disk, the lubricant scraped from the optical disk and dust adhering to the optical disk adhere to the magnetic head each time the recording / reproducing operation is repeated. Therefore,
If this is left as it is, proper spacing between the optical disk and the magnetic head cannot be maintained, and in the worst case, there is a possibility that a serious inconvenience such as deterioration of recording / reproducing characteristics may occur.

In order to prevent such inconvenience,
For example, as is done with a floppy disk drive or the like, it is effective to mount a cleaning disk on the optical disk device as necessary and drive the disk to rotate to wipe off foreign matter adhering to the magnetic head. . As a cleaning disk for a floppy disk drive, one in which a cleaning sheet is cut into the same size as a floppy disk, a center hub is attached, and the disk is housed in a cartridge is used.

[0005]

However, in the mini disk drive device, the magnetic head is slid on the optical disk only after the optical pickup is positioned on the designated track and the focusing operation and the tracking operation are completed. Therefore, the magnetic head cannot be cleaned even if a cleaning disk having a shape and size is simply attached to the drive device.
Therefore, development of a magnetic head cleaner suitable for an optical disk device such as a mini disk drive device is desired.

The present invention has been made to solve the above problems, and an object thereof is to perform a magnetic head for an optical disk capable of cleaning the magnetic head at any time without performing control different from that during recording and reproduction. To provide a cleaner.

[0007]

In order to achieve the above-mentioned object, the present invention is to mount a magnetic head cleaner for an optical disk in an optical disk device, and a disk body capable of optically reading signals, and a disk body of the disk body. It is composed of a cleaning sheet laminated on one side.

The disk body has a transparent substrate having a signal surface formed in a format suitable for an optical disk device,
It can be composed of a reflective film having a reflectance suitable for the optical disk device and attached to the signal surface of the transparent substrate, and a protective film covering the reflective film. Further, as the cleaning sheet, a non-woven fabric cut into a predetermined size and shape can be used. Furthermore, this magnetic head cleaner
The cleaning sheet can be rotatably housed in a cartridge having a cleaning agent injection hole formed at a portion facing the laminating surface.

[0009]

When the disc main body constituting the magnetic head cleaner is mounted on the optical disc device and the signal pre-recorded on it can be optically read out, the optical pickup can be designated by the same control as at the time of recording / reproducing. Positioning, focusing and tracking operations can be performed on the selected track. Therefore, even in an optical disk device in which the magnetic head does not slide on the optical disk only after completing the focusing operation and the tracking operation, the magnetic head can be brought into contact with the cleaning sheet, and the cleaning sheet of the magnetic head can be performed at any time. it can.

[0010]

EXAMPLE FIG. 1 schematically shows a sectional structure of a magnetic head cleaner for an optical disk according to an example. As is clear from this figure, the magnetic head cleaner 10 of this example includes a transparent substrate 1 and a reflective film 3 deposited on the signal surface 2 of the transparent substrate 1.
A protective film 4 covering the reflective film 3 and a cleaning sheet 5 attached on the protective film 4.

The transparent substrate 1 is made of, for example, glass, a polycarbonate resin, a polymethylmethacrylate resin, a polymethylpentene resin, an epoxy resin, a photocurable resin, or the like, and is made of a transparent material similar to that used in the production of a transparent substrate for an optical disk. Formed to dimensions. This transparent substrate 1
One surface of the signal surface 2 is a signal surface 2 in which recording and reproducing laser beam guide grooves and various types of pre-pits are formed in a fine concavo-convex shape in a format suitable for an optical disk device. A signal for controlling the disc rotation speed along the guide groove is recorded on the signal surface 2, and a management information recording area is provided on an inner peripheral portion or an outer peripheral portion of the signal surface 2. It is possible to record a signal indicating a disk rotation speed, recording, recording and reproducing laser beam intensity, and reproducing conditions.

The reflective film 3 is for optically reading out a signal recorded on the signal surface 2, and is made of a material having a reflectance suitable for the optical disk device, such as aluminum.
It is formed of aluminum alloy, stainless steel, or the like. In order to make the reflectance of the magnetic head cleaner 10 completely match the reflectance of the optical disc applied to the optical disc device, a film body having the same material and structure as the recording layer to be recorded on the optical disc is applied. You can also Further, although the reflective film 3 is shown as a single layer in FIG. 1, it may have an arbitrary multilayer structure.

The protective film 4 protects the reflective film 3 from mechanical shock and chemical adverse effects and adheres the cleaning sheet 5, and is formed of a resin composition. As the resin composition for forming the protective film 4, an ultraviolet curable resin composition is particularly suitable because it is easy to form a film.

The cleaning sheet 5 is formed by cutting a non-woven fabric or a polishing sheet into a ring shape, and is attached concentrically with the transparent substrate 1 as shown in FIG. The cleaning sheet 5 may be attached so as to cover the entire signal surface 2 as shown in FIG. 1, or may be attached so as to cover only a part thereof as shown in FIG. it can.

In the case where the optical disk device is an optical disk having a center hub for recording and reproducing information, the magnetic head cleaner 10 of the present invention is also provided with the same kind of center hub.

When the optical disk device is one for recording and reproducing information by mounting the optical disk housed in the disk cartridge, the magnetic head cleaner 10 of the present invention is also housed in the cartridge. 3 and 4 illustrate a cartridge for housing the magnetic head cleaner.

FIG. 3 is a perspective view showing the first example, 11 is a cartridge case, 12 is a shutter, and 13 is a shutter.
Indicates a cleaning agent injection port. The cartridge case 11 is configured to have the same function as a disc cartridge that accommodates an optical disc applied to the optical disc device, except that the cartridge case 11 has a cleaning agent inlet 13. The shutter 12 is also the same. The cleaning agent injection port 13 is opened in a portion of the magnetic head cleaner 10 housed in the cartridge case 11 that faces the cleaning sheet attaching portion. In this example, three cleaning agent injection ports 13 are opened in different radial directions.

FIG. 4 is a perspective view showing the second example, in which the cleaning agent injection port 13 is formed with an elongated hole extending in the radial direction of the magnetic head cleaner 10.
In the case of this example, there is an effect that the cleaning agent can be uniformly impregnated or applied onto the entire surface of the cleaning sheet 5.

The shape of the cleaning agent injection port 13
The number, arrangement, etc. are not limited to those in the examples of FIGS. 3 and 4, and may be any as long as the cleaning agent is applied onto the cleaning sheet 5. It is also possible to omit the cleaning agent injection port 13 and inject the cleaning agent through the window hole of the cartridge case 11 exposed by opening the shutter 12.

Hereinafter, a method of using the magnetic head cleaner 10 configured as described above and an operation of the optical disk device when the magnetic head cleaner 10 is mounted will be described.

When using the magnetic head cleaner 10, the user first injects a predetermined cleaning agent from the cleaning agent inlet 13 to impregnate or apply the cleaning agent to the cleaning sheet 5, and then, as in a normal disk cartridge. The cartridge case 11 is mounted on the optical disk device by the method. As a cleaning agent,
For example, an alcohol-based cleaning agent is used.

The optical disk device includes a cartridge case 1.
After receiving 1, the shutter 12 is opened by the built-in shutter opening / closing arm and loaded on the rotary spindle. Then, the rotary spindle and the optical pickup are activated according to the control program stored in the control device, and the optical pickup is inserted into one of the window holes exposed by opening the shutter 12. Then, the optical pickup is positioned on a predetermined track, and the focusing operation and the tracking operation are performed. After the focusing operation and the tracking operation are completed, the magnetic head is inserted into the other window hole exposed by opening the shutter 12 according to the control program, and the cleaning sheet 5 of the magnetic head cleaner 10 is applied with a predetermined pressure. Abut. By keeping this state for a predetermined time, the cleaning of the magnetic head is completed.

The ejection of the magnetic head cleaner 10 is performed in the same procedure as the ejection of a normal disk cartridge.

[0024]

As described above, according to the present invention,
As the disk body that constitutes the magnetic head cleaner, a disk body that can be installed in an optical disk device and optically read the signal recorded in advance was used. Positioning, focusing operation and tracking operation can be performed. Therefore, even in an optical disk device in which the magnetic head is not slid on the optical disk only after the focusing operation and the tracking operation are completed,
The magnetic head can be brought into contact with the cleaning sheet, and the cleaning sheet for the magnetic head can be performed at any time.

[Brief description of drawings]

FIG. 1 is a main-portion cross-sectional view schematically showing a magnetic head cleaner according to an embodiment.

FIG. 2 is a perspective view of a magnetic head cleaner according to an embodiment.

FIG. 3 is a perspective view showing a first example of a cartridge that houses a magnetic head cleaner.

FIG. 4 is a perspective view showing a second example of a cartridge that houses a magnetic head cleaner.

[Explanation of symbols]

 1 Transparent Substrate 2 Signal Surface 3 Reflective Film 4 Protective Film 5 Cleaning Sheet 10 Magnetic Head Cleaner 11 Cartridge Case 12 Shutter 13 Cleaning Agent Injection Port

Claims (4)

[Claims] 1. A magnetic head cleaner for an optical disk device, wherein a cleaning sheet is attached to one surface of a disk body which is mounted on the optical disk device and can optically read out signals. 2. The magnetic head cleaner according to claim 1, wherein the disk body has a transparent substrate having a signal surface formed in a format compatible with an optical disk device, and a reflectance compatible with the optical disk device. A magnetic head cleaner for an optical disk device, comprising a reflective film deposited on the signal surface of the transparent substrate, and a protective film covering the reflective film. 3. The magnetic head cleaner according to claim 1, wherein the cleaning sheet is made of non-woven fabric. 4. A cleaning sheet is attached to one side of a disc body that can be optically read out from a signal when mounted on an optical disc device, and a cleaning agent injection hole is formed in a portion facing the attaching surface of the cleaning sheet. A magnetic head cleaner for an optical disk device, which is rotatably housed in a cartridge.